Double blind



FIG. 1 is a perspective view of a double blind showing the said Design;

FIG. 2 is a top plan view of the design of FIG. 1

FIG. 3 is a front elevation of the design of FIG. 1;

FIG. 4 is a bottom plan of the design of FIG. 1,

FIG. 5 is a right side elevation of the design of FIG. 1,

FIG. 6 is a rear elevation of the design of FIG. 1; and,

FIG. 7 is a left side elevation of the design of FIG. 1. 

CLAIM The ornamental design for a double blind, as shown and described. 